package www.tvbigo.cn.xiaoxuan.app;

import android.graphics.Camera;
import android.graphics.Matrix;
import android.view.animation.Animation;
import android.view.animation.Transformation;

public class Rotate3dAnimation extends Animation
{
    private final float mFromDegrees;
    
    private final float mToDegrees;
    
    private final float mCenterX;
    
    private final float mCenterY;
    
    private final float mDepthZ;
    
    private final boolean mReverse;
    
    private Camera mCamera;
    
    public Rotate3dAnimation(float fromDegrees, float toDegrees, float centerX, float centerY, float depthZ,
        boolean reverse)
    {
        mFromDegrees = fromDegrees;
        mToDegrees = toDegrees;
        mCenterX = centerX;
        mCenterY = centerY;
        mDepthZ = depthZ;
        mReverse = reverse;
    }
    
    @Override
    public void initialize(int width, int height, int parentWidth, int parentHeight)
    {
        super.initialize(width, height, parentWidth, parentHeight);
        mCamera = new Camera();
    }
    
    @Override
    protected void applyTransformation(float interpolatedTime, Transformation t)
    {
        final float fromDegrees = mFromDegrees;
        float degrees = fromDegrees + ((mToDegrees - fromDegrees) * interpolatedTime);
        
        final float centerX = mCenterX;
        final float centerY = mCenterY;
        final Camera camera = mCamera;
        
        final Matrix matrix = t.getMatrix();
        
        camera.save();
        if (mReverse)
        {
            camera.translate(0.0f, 0.0f, mDepthZ * interpolatedTime);
        }
        else
        {
            camera.translate(0.0f, 0.0f, mDepthZ * (1.0f - interpolatedTime));
        }
        camera.rotateY(degrees);
        camera.getMatrix(matrix);
        camera.restore();
        
        matrix.preTranslate(-centerX, -centerY);
        matrix.postTranslate(centerX, centerY);
    }
}
